[Cialug] nslookup works but ping cannot resolve

Paul Gray gray at cs.uni.edu
Fri Feb 8 13:12:53 CST 2008


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Nathan Stien wrote:
> On Feb 8, 2008 12:53 PM, Paul Gray <gray at cs.uni.edu> wrote:
>> Then, the course of diagnostics that I would suggest:
>>   <strace & tcpdump instructions snipped>
> 
> I sincerely appreciate the pointers, but I have a question:
> 
> When I try to ping a local hostname on my network, the name never
> resolves, so ping never emits any ICMP packets.  Would your above
> advice still be relevant?  Your tips here seem to involve looking at
> ICMP traffic which doesn't occur.  The remote host never gets any
> indication that my laptop tried to ping it, since my laptop can't
> figure out which IP to ping.

That's why I only suggested sniffing ICMP on the remote host.  You'll be
able to capture any dns queries on the system that's having the resolve
issue.

- -PG
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